JP2004311397A - Electrode unit and secondary battery utilizing this - Google Patents

Electrode unit and secondary battery utilizing this Download PDF

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JP2004311397A
JP2004311397A JP2003393528A JP2003393528A JP2004311397A JP 2004311397 A JP2004311397 A JP 2004311397A JP 2003393528 A JP2003393528 A JP 2003393528A JP 2003393528 A JP2003393528 A JP 2003393528A JP 2004311397 A JP2004311397 A JP 2004311397A
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electrode
uncoated portion
plate
electrode plate
assembly
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JP4425613B2 (en
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Shosho Kin
昌 燮 金
Su-Jin Han
秀 振 韓
Min-Ilo Bong
民 鎬 宋
Jun-Won Kang
▲しゅん▼ 遠 姜
Ju-Hyung Kim
柱 衡 金
Soo-Youn Maenn
壽 蓮 孟
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Samsung SDI Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
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    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49108—Electric battery cell making
    • Y10T29/49115—Electric battery cell making including coating or impregnating

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrode unit and a secondary battery utilizing this. <P>SOLUTION: The electrode unit is provided with a first electrode plate 24 in which a first electrode uncoated portion 23 is formed at least on one side end part of a first electrode current collector coated at least with a first electrode active material, a second electrode plate 28 in which a second electrode uncoated portion 27 is formed at least on one side end part of a second electrode current collector coated with at least a second electrode active material, and which is wound up together with the first electrode plate, and a separator 30 interposed between the first electrode plate 24 and the second electrode plate 28, and at least two folds insulating separator 33 is installed between the first electrode plain part 23 and the second electrode plain part 27. The secondary battery utilizes a lying-position electrode unit. By this, in winding up the first electrode plate 24, the second electrode plate 28 and the separator 30, insulation between the first electrode plain part 23 and the second electrode plain part 27 can be enhanced and an external impact can be buffered. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は二次電池に係り、より詳細には正極極板と負極極板とがセパレータを介して巻取られた電極組立体及びこれを利用した電池に関する。   The present invention relates to a secondary battery, and more particularly, to an electrode assembly in which a positive electrode plate and a negative electrode plate are wound via a separator, and a battery using the same.

携帯電話、カムコーダ、ノート型パソコンなどの軽量化及び無線化が急速に進まれるにつれてその駆動電源としてエネルギー密度の高いリチウムイオン電池が求められ、活発に開発されている。このようなリチウム２次電池は円形や非円形の螺旋状に巻取られた電極組立体が円形または角形の缶またはパウチに収容されてなる。   2. Description of the Related Art As the weight and wirelessness of mobile phones, camcorders, notebook computers, and the like have been rapidly reduced, lithium-ion batteries having a high energy density have been demanded as driving power sources, and are being actively developed. Such a lithium secondary battery includes a circular or non-circular spirally wound electrode assembly housed in a circular or square can or pouch.

前記のような二次電池において、電極組立体はストリップ状の正極集電体の両端部の一部（以下、正極無地部という）を除いて正極活物質がコーティングされてなる正極極板と、ストリップ状の負極集電体の両端部の一部（以下、負極無地部という）を除いて負極活物質がコーティングされてなる負極極板と、前記正極極板と負極極板間にセパレータが設置された状態で螺旋状に巻取られてなる。そして、前記正極及び負極極板に設置された無地部の少なくとも一側にはそれぞれリードが設置されている。   In the above secondary battery, the electrode assembly includes a positive electrode plate coated with a positive electrode active material except for a part of both ends of a strip-shaped positive electrode current collector (hereinafter, referred to as a positive electrode uncoated portion), A negative electrode plate coated with a negative electrode active material except for a part of both end portions of a strip-shaped negative electrode current collector (hereinafter, referred to as a negative electrode uncoated portion), and a separator provided between the positive electrode plate and the negative electrode plate It is spirally wound in a state where it is made. Leads are provided on at least one side of the uncoated portions provided on the positive and negative electrode plates, respectively.

一方、前記無地部は薄板状になっているので、初期巻取り時に前記負極と正極無地部間に摺動が発生する傾向がある。また前記無地部にはリードが連結されており、前記リードが連結された部位には必要に応じてテープを付着して対向する正極無地部と負極無地部間に絶縁性を高めている。しかし、正極無地部及び負極無地部の少なくとも一側にバーが発生した場合、このバーにより絶縁が破壊される問題点がある。また、巻取られる正極無地部と負極無地部とはセパレータにより相互絶縁されてはいるが、この絶縁による信頼性が相対的に低い。   On the other hand, since the uncoated portion has a thin plate shape, sliding tends to occur between the negative electrode and the positive electrode uncoated portion during initial winding. A lead is connected to the uncoated portion, and a tape is attached to a portion to which the lead is connected as necessary to enhance insulation between the opposed uncoated portion of the positive electrode and uncoated portion of the negative electrode. However, when a bar is formed on at least one side of the uncoated portion of the positive electrode and the uncoated portion of the negative electrode, there is a problem that the insulation is broken by the bar. Further, the positive electrode uncoated portion and the negative electrode uncoated portion to be wound are mutually insulated by the separator, but the reliability due to this insulation is relatively low.

一方、特許文献１には非円形スパイラル電池の電極組立体が開示されている。開示された電極組立体は正極板と負極板及びこれら間に介在されたセパレータがスパイラルタイプに巻取られたものであって、正極と負極との巻取られた開始位置が外れており、最も中心に近い極板の折曲部には先巻極板だけ位置し、後巻極板が巻取られ始める位置は先巻極板の最初の折曲より後方に位置する。そして、先巻極板の最初の折曲部は外周に巻取られている先巻極板と対向して位置する。   On the other hand, Patent Literature 1 discloses an electrode assembly of a non-circular spiral battery. The disclosed electrode assembly is one in which a positive electrode plate, a negative electrode plate and a separator interposed therebetween are wound in a spiral type, and the winding start positions of the positive electrode and the negative electrode are out of alignment. Only the first winding electrode plate is located at the bent portion of the electrode plate near the center, and the position where the rear winding electrode plate starts to be wound is located behind the first bending of the first winding electrode plate. Then, the first bent portion of the first-wound electrode plate is located to face the first-wound electrode plate wound around the outer periphery.

特許文献２にはスパイラル型電極組立体を有する電池が開示されている。開示された電極組立体は負電極ストリップの電極コア材質の露出された領域の両側にセパレータを通じて同じ極が位置する構成を有している。   Patent Document 2 discloses a battery having a spiral electrode assembly. The disclosed electrode assembly has a configuration in which the same electrode is located through the separator on both sides of the exposed region of the electrode core material of the negative electrode strip.

そして、特許文献３にはスパイラル型電極組立体を有する電池が開示されている。電極組立体が巻取られる最内側には負極板が位置し、最外側には銅箔の正極板が位置した構成が開示されている。   Patent Literature 3 discloses a battery having a spiral electrode assembly. A configuration is disclosed in which a negative electrode plate is located on the innermost side where the electrode assembly is wound, and a positive electrode plate made of copper foil is located on the outermost side.

前述したように構成されたスパイラル型電極組立体は、正極と負極などの露出領域、すなわち、無地部の領域を限定したものであって、これらの絶縁による信頼度が低いという問題点が内在している。また、電極組立体の中央部に緩衝部材がないので外部からの衝撃に対して緩衝の役割を果たせない問題点がある。
特開平８−３９８１７号公報 米国特許第５，５０８，１２２号公報 特開平１１−１１１３２７号公報 The spiral-type electrode assembly configured as described above limits the exposed areas such as the positive electrode and the negative electrode, that is, the area of the uncoated area, and has a problem that the reliability due to the insulation is low. ing. Also, since there is no cushioning member at the center of the electrode assembly, there is a problem that it cannot function as a buffer against external impact.
JP-A-8-39817 US Patent No. 5,508,122 JP-A-11-111327

本発明は前記問題点を解決するために、第１電極板と第２電極板及びセパレータの巻取り時、第１電極無地部と第２電極無地部間の絶縁性を高めることができ、外部からの衝撃を緩衝させうる電極組立体及びこれを利用した二次電池を提供するところにその目的がある。   In order to solve the above problems, the present invention can enhance the insulation between the first electrode uncoated portion and the second electrode uncoated portion when winding the first electrode plate, the second electrode plate, and the separator. It is an object of the present invention to provide an electrode assembly capable of buffering impact from a battery and a secondary battery using the same.

前記のような目的を達成するために本発明は、少なくとも第１電極活物質が塗布された第１電極集電体の少なくとも一側端部に第１電極無地部が形成された第１電極板と、少なくとも第２電極活物質が塗布された第２電極集電体の少なくとも一側端部に第２電極無地部が形成されて前記第１電極板と共に巻取られた第２電極板と、前記第１電極板と前記第２電極板間に介在されたセパレータと、を具備し、前記第１電極無地部と前記第２電極無地部間には少なくとも二重以上の絶縁セパレータが設置されたことを特徴とする電極組立体を提供する。   In order to achieve the above object, the present invention provides a first electrode plate in which a first electrode uncoated portion is formed at least at one end of a first electrode current collector coated with a first electrode active material. A second electrode plate formed by forming a second electrode uncoated portion on at least one end of the second electrode current collector to which the second electrode active material is applied, and winding the same together with the first electrode plate; A separator interposed between the first electrode plate and the second electrode plate, wherein at least two or more insulating separators are provided between the first electrode uncoated portion and the second electrode uncoated portion. An electrode assembly is provided.

前記のような目的を達成するために本発明はまた、少なくとも第１電極活物質が塗布された第１電極集電体の少なくとも一側端部に第１電極無地部が形成された第１電極板と、少なくとも第２電極活物質が塗布された第２電極集電体の少なくとも一側端部に第２電極無地部が形成されて前記第１電極板と共に巻取られた第２電極板と、前記第１電極板と前記第２電極板間に介在されたセパレータと、を具備し、前記第１電極無地部と前記第２電極無地部間には少なくとも二重以上のセパレータが設置されたことを特徴とする電極組立体と、前記電極組立体を収納して密封し、前記電極組立体と電気的に連結された端子部を具備したケースと、を含んでなることを特徴とする二次電池を提供する。   In order to achieve the above object, the present invention also provides a first electrode having a first electrode uncoated portion formed on at least one end of a first electrode current collector coated with a first electrode active material. A second electrode plate having a second electrode uncoated portion formed at least at one end of the second electrode current collector to which the second electrode active material is applied, and wound together with the first electrode plate; A separator interposed between the first electrode plate and the second electrode plate, and at least two or more separators are provided between the first electrode uncoated portion and the second electrode uncoated portion. An electrode assembly comprising: an electrode assembly; and a case having a terminal portion that houses and seals the electrode assembly and is electrically connected to the electrode assembly. Provide the next battery.

本発明の組立体及びこれを利用した電池は、正極無地部と負極無地部間に少なくとも二重以上の絶縁セパレータを設置することによって絶縁特性を向上させることができ、正極無地部または負極無地部に付着された端子部の絶縁のためにテープの付着を最小化するか除去できる。   The assembly of the present invention and a battery using the same can improve insulation characteristics by installing at least two or more insulating separators between a positive electrode uncoated portion and a negative electrode uncoated portion, and can improve a positive electrode uncoated portion or a negative electrode uncoated portion. In order to insulate the terminals attached to the tape, the adhesion of the tape can be minimized or eliminated.

以下、添付した図面を参照して本発明による望ましい実施例を詳細に説明すれば次の通りである。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

図１には本発明による充放電可能な二次電池の一実施例を示した。   FIG. 1 shows an embodiment of a chargeable / dischargeable secondary battery according to the present invention.

図面を参照すれば、二次電池１０は、第１電極タブ２４ａ及び第２電極タブ２８ａが外部に引出された電極組立体２０と、前記電極組立体２０が収納されて密封されるケースと、を備える。   Referring to the drawings, the secondary battery 10 includes an electrode assembly 20 having a first electrode tab 24a and a second electrode tab 28a drawn out, and a case in which the electrode assembly 20 is housed and sealed. Is provided.

図１は、本発明の望ましい一実施例による角形二次電池を示したものであって、前記ケースは、缶１１と、キャップ組立体１２とよりなる。前記缶１１は、図１に図示されたように、ほぼ直方体の形状を有する金属材よりなり、これによりそれ自体が端子の役割を行える。本発明の望ましい一実施例において、前記缶１１は軽量の伝導性金属であるＡｌまたはＡｌ合金で形成される。また、前記缶１１はその一面が開口されており、これを通じて前記電極組立体２０が缶１１の内部に収納される。前記缶１１は、図１に図示されたように、その側面の角部分が角張った角形になることもあり、図示されなかったが、その角部分がラウンド処理されたラウンド型になることもある。   FIG. 1 illustrates a prismatic secondary battery according to a preferred embodiment of the present invention. The case includes a can 11 and a cap assembly 12. As shown in FIG. 1, the can 11 is made of a metal material having a substantially rectangular parallelepiped shape, so that the can itself can serve as a terminal. In a preferred embodiment of the present invention, the can 11 is made of a lightweight conductive metal such as Al or an Al alloy. The can 11 has an opening on one side, through which the electrode assembly 20 is housed inside the can 11. As shown in FIG. 1, the corner of the side of the can 11 may have an angular shape. Although not shown, the corner may have a round shape in which the corner is rounded. .

前記のような缶１１には、キャップ組立体１２が密封されるが、前記キャップ組立体１２は前記缶の開口部に直接溶接されて密封するキャッププレート１３を具備する。前記缶１１及びキャッププレート１３はその溶接の容易性のために同じ金属材で備えられる。   The cap assembly 12 is sealed in the can 11 as described above, and the cap assembly 12 includes a cap plate 13 that is directly welded to an opening of the can to seal. The can 11 and the cap plate 13 are made of the same metal material for easy welding.

前記キャップ組立体１２には前記キャッププレート１３にガスケット（図示せず）を通じて絶縁されるように貫通形成された端子ピン１４が形成されるが、この端子ピン１４の下部には絶縁プレート及び端子プレート（図示せず）がさらに形成されて前記端子ピン１４をキャッププレート１３と絶縁させる。この端子ピン１４の下部に電極組立体２０の第１電極板から引出された第１電極タブ２４ａが溶接されて第１電極端子部としての機能をする。   A terminal pin 14 is formed in the cap assembly 12 so as to be insulated from the cap plate 13 through a gasket (not shown). Below the terminal pin 14, an insulating plate and a terminal plate are formed. (Not shown) is further formed to insulate the terminal pins 14 from the cap plate 13. A first electrode tab 24a drawn from the first electrode plate of the electrode assembly 20 is welded to a lower portion of the terminal pin 14 to function as a first electrode terminal.

一方、第２電極板から引出された第２電極タブ２８ａは前記キャッププレート１３の底面や、缶１１の内面に直接電気的に連結されて前記端子ピン１４を除外した電池の外部全体が第２電極端子部としての機能を行うようにする。しかし、このような第１及び第２電極端子の構造は必ずこれに限定されるのではなく、前記第２電極端子部の構造も前記第１電極端子部の構造のように別途の端子ピンを通じて形成することもあり、その外にも他のいかなる構造も適用できる。   On the other hand, the second electrode tab 28a pulled out from the second electrode plate is directly electrically connected to the bottom surface of the cap plate 13 or the inner surface of the can 11, so that the entire outside of the battery except for the terminal pins 14 is the second electrode tab 28a. It functions as an electrode terminal. However, the structure of the first and second electrode terminals is not necessarily limited to this, and the structure of the second electrode terminal may also be changed through a separate terminal pin like the structure of the first electrode terminal. It may be formed, and any other structure can be applied.

一方、前記電極組立体２０は、図２に示されたように、フレキシブルなパウチ型ケース１５に収納されうるが、この場合、各電極タブ、すなわち、第１電極タブ２４ａ及び第２電極タブ２８ａはパウチ型ケース１５の外部に引出される。   Meanwhile, the electrode assembly 20 can be housed in a flexible pouch-type case 15 as shown in FIG. 2. In this case, each electrode tab, that is, the first electrode tab 24 a and the second electrode tab 28 a Is drawn out of the pouch type case 15.

前記のようなケースに収納される前記電極組立体２０は、図３に示されるように、第１電極板２４及び第２電極板２８がセパレータ３０を介して形成されたものであって、本発明の望ましい一実施例によれば、第１及び第２電極板２４、２８がセパレータ３０を介して積層された後、巻取られたゼリーロール状の電極組立体２０が使われる。   As shown in FIG. 3, the electrode assembly 20 housed in the case described above has a first electrode plate 24 and a second electrode plate 28 formed with a separator 30 interposed therebetween. According to a preferred embodiment of the present invention, the jelly roll-shaped electrode assembly 20 is used after the first and second electrode plates 24 and 28 are stacked via the separator 30.

本発明の望ましい一実施例において、前記第１電極板２４は負極板として使われうる。このように負極板として使われうる第１電極板２４は、ストリップ状の金属薄板よりなる第１電極集電体２２を具備し、前記第１電極集電体２２としては銅薄板が使われうる。前記第１電極集電体２２の少なくとも一面には第１電極活物質を含む第１電極合剤がコーティングされた第１電極コーティング部２１が形成され、前記第１電極活物質としては炭素材を使用し、これにバインダー、可塑剤、導電材などを含有して第１電極合剤をなしうる。   In one preferred embodiment of the present invention, the first electrode plate 24 may be used as a negative electrode plate. The first electrode plate 24 that can be used as the negative electrode plate includes the first electrode current collector 22 formed of a strip-shaped metal thin plate, and the first electrode current collector 22 may be a copper thin plate. . A first electrode coating part 21 coated with a first electrode mixture including a first electrode active material is formed on at least one surface of the first electrode current collector 22, and a carbon material is used as the first electrode active material. Used, and a binder, a plasticizer, a conductive material and the like may be added thereto to form the first electrode mixture.

また、正極板として使われうる前記第２電極板２８はストリップ状の金属薄板よりなる第２電極集電体２６を具備し、前記第２電極集電体２６としてはアルミニウム薄板が使われうる。前記第２電極集電体２６の少なくとも一面には第２正極活物質を含む第２電極合剤がコーティングされる第２電極コーティング部２５が形成される。前記第２電極活物質としてはリチウム系酸化物を使用し、これにバインダー、可塑剤、導電材などを含有して第２電極合剤をなしうる。   Also, the second electrode plate 28, which can be used as a positive electrode plate, includes a second electrode current collector 26 made of a strip-shaped metal thin plate. As the second electrode current collector 26, an aluminum thin plate can be used. A second electrode coating part 25 is formed on at least one surface of the second electrode current collector 26 to be coated with a second electrode mixture including a second positive electrode active material. As the second electrode active material, a lithium-based oxide may be used, and a binder, a plasticizer, a conductive material, and the like may be added thereto to form a second electrode mixture.

図３にはこのような第１及び第２電極板２４、２８の巻取り中心部を示したが、この巻取り中心部には前記第１電極集電体２２及び第２電極集電体２６から延びた第１電極無地部２３及び第２電極無地部２７が形成されている。そして、このように巻取り中心部に位置した第１電極無地部２３には第１電極タブ２４ａが溶接されている。この第１電極タブ２４ａとしてはニッケル薄膜が使われうる。そして、第２電極タブ２８ａとしてはアルミニウム薄膜が使われ、図１に図示されたように、電極組立体２０の最外側に位置できる。もちろん、第２電極タブ２８ａも第１電極タブ２４ａと同じく、巻取り中心部の第１電極無地部に位置できる。   FIG. 3 shows the winding center of the first and second electrode plates 24 and 28. The winding center of the first and second electrode plates 24 and 28 includes the first electrode current collector 22 and the second electrode current collector 26. A first electrode uncoated portion 23 and a second electrode uncoated portion 27 extending from the first electrode uncoated portion 23 are formed. The first electrode tab 24a is welded to the first electrode uncoated portion 23 located at the winding center as described above. As the first electrode tab 24a, a nickel thin film can be used. In addition, an aluminum thin film is used as the second electrode tab 28a, and can be located on the outermost side of the electrode assembly 20, as shown in FIG. Of course, like the first electrode tab 24a, the second electrode tab 28a can be located at the first electrode uncoated portion at the winding center.

ここで、前記電極組立体２０の最内側に位置して螺旋状に巻取られる第１電極無地部２３と第２電極無地部２７間に位置する絶縁セパレータ３３は少なくとも二重以上よりなる。第１電極無地部２３と第２電極無地部２７間に位置する二重以上の絶縁セパレータ３３は、第１電極板２４と第２電極板２８間に介在される第１セパレータ３１の端部が折畳まれるか巻取られ、図示されなかったが、第１セパレータ３１だけでなく、第２セパレータ３２の端部も折畳まれるか巻取られる。そして、前記第１、２セパレータ３１、３２のうち少なくとも一つのセパレータの端部は巻取られて電極組立体２０の最内側に位置させることが望ましい。   Here, the insulating separator 33 located between the first electrode uncoated portion 23 and the second electrode uncoated portion 27 which is located on the innermost side of the electrode assembly 20 and spirally wound is at least double. The double or more insulating separators 33 located between the first electrode uncoated portion 23 and the second electrode uncoated portion 27 have an end portion of the first separator 31 interposed between the first electrode plate 24 and the second electrode plate 28. Although not shown, not only the first separator 31 but also the end of the second separator 32 may be folded or wound. The end of at least one of the first and second separators 31 and 32 may be wound and positioned at the innermost side of the electrode assembly 20.

前記のように第１電極板２４と第２電極板２８とに第１、２セパレータ３１、３２を介在させた状態で巻取られた電極組立体２０の最内側に位置する第１電極無地部２３と第２電極無地部２７とはその一部が少なくとも二重以上の絶縁セパレータ３３を介して重畳させることが望ましい。   As described above, the first electrode uncoated portion located on the innermost side of the electrode assembly 20 wound with the first and second separators 31 and 32 interposed between the first electrode plate 24 and the second electrode plate 28. It is desirable that a part of the uncoated portion 23 and the uncoated portion 27 of the second electrode be overlapped via at least a double or more insulating separator 33.

このように、ケースに内蔵される電極組立体２０の中心部に位置する第１電極無地部２３と第２電極無地部２７間に絶縁セパレータ３３が少なくとも二重以上に設けられているので、前記第１電極無地部２３と第２電極無地部２７間の絶縁特性を向上できる。特に、第１電極無地部２３及び／または第２電極無地部２７にバーが形成されているとしても、二重以上の絶縁セパレータ３３により絶縁されて第１電極無地部２３と第２電極無地部２７間の絶縁が破壊されることが防止できる。   As described above, since the insulating separator 33 is provided at least double between the first electrode uncoated portion 23 and the second electrode uncoated portion 27 located at the center of the electrode assembly 20 built in the case, The insulation characteristics between the first electrode uncoated portion 23 and the second electrode uncoated portion 27 can be improved. In particular, even if a bar is formed in the first electrode uncoated portion 23 and / or the second electrode uncoated portion 27, the first electrode uncoated portion 23 and the second electrode uncoated portion are insulated by the double or more insulating separators 33. Breaking of the insulation between 27 can be prevented.

そして、前記第１電極無地部２３と第２電極無地部２７間に介在される二重以上のセパレータ３３は、外部から電極組立体２０への衝撃に対して緩衝の役割を行うので衝撃による電池の損傷が防止できる。   The double or more separators 33 interposed between the first electrode uncoated portion 23 and the second electrode uncoated portion 27 serve as a buffer against an external impact to the electrode assembly 20, so that the battery due to the impact can be used. Damage can be prevented.

一方、このように重畳された第１電極無地部２３及び第２電極無地部２７には電極タブを位置させうるが、すなわち、図３に示されたように、重畳された第１電極無地部２３に第１電極タブ２４ａを溶接して接合できる。もちろん、この第１電極タブ２４ａの外側には絶縁テープ３４を付着できる。このように第１電極タブ２４ａを重畳部位、特に、二重以上のセパレータ３３が位置した箇所に配置させることによって電極タブにバーが存在してもこのバーにより第１電極板と第２電極板との絶縁が破壊されることが防止できる。   Meanwhile, an electrode tab may be positioned on the first electrode uncoated portion 23 and the second electrode uncoated portion 27, that is, as illustrated in FIG. 3, the first electrode uncoated portion 23 and the second electrode uncoated portion 27 are overlapped. The first electrode tab 24a can be joined to the first electrode tab 23 by welding. Of course, the insulating tape 34 can be attached to the outside of the first electrode tab 24a. By arranging the first electrode tab 24a at the overlapping portion, particularly at the position where the double or more separators 33 are located, even if a bar exists in the electrode tab, the first electrode plate and the second electrode plate are formed by the bar. Can be prevented from being broken.

以上で説明したような構造は図４に図示されたように、第１電極タブ２４ａ及び第２電極タブ２８ａが中心部に配置された電極組立体の場合にももちろん同一に適用できる。   The structure described above can be applied to an electrode assembly in which the first electrode tab 24a and the second electrode tab 28a are arranged at the center as shown in FIG.

本発明は図面に図示された実施例を参考として説明されたが、これは例示的なものに過ぎず、当業者であればこれより多様な変形及び均等な他の実施例が可能であるということが理解できる。したがって、本発明の真の保護範囲は特許請求の範囲のみにより定められねばならない。   Although the present invention has been described with reference to the embodiments illustrated in the drawings, it is to be understood that this is by way of example only, and that those skilled in the art will appreciate that various modifications and other alternative embodiments are possible. I can understand that. Therefore, the true scope of protection of the present invention should be determined only by the appended claims.

本発明は携帯電話、カムコーダ、ノート型パソコンなどの駆動電源であるリチウム二次電池に適用できる。   INDUSTRIAL APPLICABILITY The present invention can be applied to a lithium secondary battery that is a driving power source for a mobile phone, a camcorder, a notebook computer, and the like.

本発明による二次電池の分離斜視図である。1 is an exploded perspective view of a secondary battery according to the present invention. 本発明による二次電池の一部切除斜視図である。1 is a partially cutaway perspective view of a secondary battery according to the present invention. 本発明の一実施例による電極組立体を分離して示した側面図である。FIG. 2 is a side view illustrating an electrode assembly according to an embodiment of the present invention. 本発明の他の一実施例による電極組立体の最内側部を示した斜視図である。FIG. 9 is a perspective view illustrating an innermost portion of an electrode assembly according to another embodiment of the present invention.

符号の説明Explanation of symbols

１０ 二次電池
１１ 缶
１２ キャップ組立体
１３ キャッププレート
１４ 端子ピン
２０ 電極組立体
２４ａ 第１電極タブ
２８ａ 第２電極タブ Reference Signs List 10 secondary battery 11 can 12 cap assembly 13 cap plate 14 terminal pin 20 electrode assembly 24a first electrode tab 28a second electrode tab

Claims (10)

少なくとも第１電極活物質が塗布された第１電極集電体の少なくとも一側端部に第１電極無地部が形成された第１電極板と、
少なくとも第２電極活物質が塗布された第２電極集電体の少なくとも一側端部に第２電極無地部が形成されて、前記第１電極板と共に巻取られた第２電極板と、
前記第１電極板と前記第２電極板間に介在されたセパレータと、
を具備し、
前記第１電極無地部と前記第２電極無地部間には少なくとも二重以上の絶縁セパレータが設置されたことを特徴とする電極組立体。 A first electrode plate having a first electrode uncoated portion formed on at least one end of the first electrode current collector to which at least the first electrode active material has been applied;
A second electrode uncoated portion formed on at least one end of the second electrode current collector to which at least the second electrode active material is applied, and a second electrode plate wound together with the first electrode plate;
A separator interposed between the first electrode plate and the second electrode plate;
Comprising
An electrode assembly, wherein at least two or more insulating separators are provided between the first electrode uncoated portion and the second electrode uncoated portion. 前記第１電極無地部と前記第２電極無地部とは、少なくとも二重以上のセパレータを介して所定の幅に重畳されていることを特徴とする請求項１に記載の電極組立体。   The electrode assembly according to claim 1, wherein the first electrode uncoated portion and the second electrode uncoated portion are overlapped with a predetermined width via at least a double or more separator. 前記第１電極無地部と前記第２電極無地部との重畳されている部分には第１電極タブまたは第２電極タブが位置することを特徴とする請求項２に記載の電極組立体。   The electrode assembly according to claim 2, wherein a first electrode tab or a second electrode tab is located at a portion where the first electrode uncoated portion and the second electrode uncoated portion overlap. 前記第１電極無地部及び第２電極無地部の前記第１電極タブ及び前記第２電極タブが位置する部分には絶縁テープがさらに付着されていることを特徴とする請求項３に記載の電極組立体。   The electrode according to claim 3, wherein an insulating tape is further attached to a portion of the first electrode uncoated portion and the second electrode uncoated portion where the first electrode tab and the second electrode tab are located. Assembly. 前記第１電極無地部と前記第２電極無地部間に設置される二重以上のセパレータは、前記第１電極板と前記第２電極板との間に設置されるセパレータの端部が折畳まれるか巻取られてなることを特徴とする請求項２に記載の電極組立体。   The double or more separators installed between the first electrode uncoated portion and the second electrode uncoated portion may be configured such that an end of the separator installed between the first electrode plate and the second electrode plate is folded. 3. The electrode assembly according to claim 2, wherein the electrode assembly is wound or wound. 少なくとも第１電極活物質が塗布された第１電極集電体の少なくとも一側端部に第１電極無地部が形成された第１電極板と、少なくとも第２電極活物質が塗布された第２電極集電体の少なくとも一側端部に第２電極無地部が形成されて前記第１電極板と共に巻取られた第２電極板と、前記第１電極板と第２電極板間に介在されたセパレータと、を具備し、前記第１電極無地部と第２電極無地部間には少なくとも二重以上のセパレータが設置されたことを特徴とする電極組立体と、
前記電極組立体を収納して密封し、前記電極組立体と電気的に連結された端子部を具備したケースと、
を含んでなることを特徴とする二次電池。 A first electrode plate having a first electrode uncoated portion formed on at least one end of the first electrode current collector on which at least the first electrode active material is applied, and a second electrode plate having at least a second electrode active material applied thereon A second electrode uncoated portion is formed at least at one end of the electrode current collector and is wound together with the first electrode plate, and is interposed between the first electrode plate and the second electrode plate. An electrode assembly, comprising: a first electrode uncoated portion and a second electrode uncoated portion, at least two or more separators are provided between the first electrode uncoated portion and the second electrode uncoated portion.
A case including a terminal unit that houses and seals the electrode assembly and is electrically connected to the electrode assembly;
A secondary battery comprising: 前記第１電極無地部及び前記第２電極無地部は、少なくとも二重以上の絶縁セパレータを介して所定の幅に重畳されたことを特徴とする請求項６に記載の二次電池。   The secondary battery according to claim 6, wherein the first electrode uncoated portion and the second electrode uncoated portion are overlapped with a predetermined width via at least a double or more insulating separator. 前記第１電極無地部と前記第２電極無地部との重畳された部分には第１電極タブまたは第２電極タブが位置することを特徴とする請求項７に記載の二次電池。   The secondary battery according to claim 7, wherein a first electrode tab or a second electrode tab is located at a portion where the first electrode uncoated portion and the second electrode uncoated portion overlap. 前記第１電極無地部及び前記第２電極無地部の前記第１電極タブ及び前記第２電極タブが位置する部分には絶縁テープがさらに付着されていることを特徴とする請求項８に記載の二次電池。   9. The apparatus of claim 8, wherein an insulating tape is further attached to a portion of the first electrode uncoated portion and the second electrode uncoated portion where the first electrode tab and the second electrode tab are located. 10. Secondary battery. 前記第１電極無地部と前記第２電極無地部との間に設置される二重以上の絶縁セパレータは、前記第１電極板と前記第２電極板間に設置されるセパレータの端部が折畳まれるか巻取られてなることを特徴とする請求項７に記載の二次電池。   The double or more insulating separator installed between the first electrode uncoated portion and the second electrode uncoated portion may be formed by bending the end of the separator installed between the first electrode plate and the second electrode plate. The secondary battery according to claim 7, wherein the secondary battery is folded or wound.
JP2003393528A 2003-03-12 2003-11-25 Electrode assembly and secondary battery using the same Expired - Lifetime JP4425613B2 (en)

Applications Claiming Priority (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013143224A (en) * 2012-01-10 2013-07-22 Toyota Industries Corp Power storage device and vehicle

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9508973B2 (en) * 2004-05-25 2016-11-29 Samsung Sdi Co., Ltd. Secondary battery
KR100601548B1 (en) * 2004-05-25 2006-07-19 삼성에스디아이 주식회사 Secondary battery
KR100624936B1 (en) * 2004-10-28 2006-09-15 삼성에스디아이 주식회사 Secondary battery
US7875379B2 (en) * 2005-07-08 2011-01-25 Greatbatch Ltd. Electrochemical cell having a pocket separator design
JP4259558B2 (en) * 2006-09-26 2009-04-30 トヨタ自動車株式会社 Battery and battery manufacturing method
KR100943570B1 (en) * 2007-10-30 2010-02-23 삼성에스디아이 주식회사 Battery pack
KR101009517B1 (en) * 2008-06-23 2011-01-18 삼성에스디아이 주식회사 Electrode Assembly and Lithium Secondary battery with the Same
US8168319B2 (en) * 2008-10-13 2012-05-01 Apple Inc. Portable computer battery structures
US8144474B2 (en) * 2008-10-13 2012-03-27 Apple Inc. Portable computer structures
US8170266B2 (en) * 2008-10-13 2012-05-01 Apple Inc. Portable computer speaker grill structures
US8179673B2 (en) 2008-10-13 2012-05-15 Apple Inc. Portable computer hard drive structures
US8125344B2 (en) * 2008-10-13 2012-02-28 Apple Inc. Portable computer battery indicator
US7965495B2 (en) * 2008-10-13 2011-06-21 Apple Inc. Battery connector structures for electronic devices
KR101084079B1 (en) * 2008-12-09 2011-11-16 삼성에스디아이 주식회사 Rechargeable battery and electrode assembly used thereof
CN102282716B (en) * 2010-02-05 2014-07-23 丰田自动车株式会社 Electrode body for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery
KR102624595B1 (en) * 2016-12-23 2024-01-15 삼성전자주식회사 Method for coating active material of battery and electronic device with the battery
CN206401456U (en) * 2016-12-27 2017-08-11 宁德新能源科技有限公司 A kind of takeup type battery core
EP3605697A1 (en) * 2018-07-31 2020-02-05 VARTA Microbattery GmbH Method for producing an electrode separator coil, electrode separator coil and button cell comprising such a coil
CN113517472B (en) * 2021-03-18 2022-12-23 河南鑫泉能源科技有限公司 Alignment method for positive and double-pole ears of cylindrical lithium ion battery

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1466419A (en) * 1965-12-01 1967-01-20 Accumulateurs Fixes Process for manufacturing electrodes for electric accumulators, electrodes thus obtained and accumulators provided with these electrodes
JP3272076B2 (en) * 1993-01-29 2002-04-08 三洋電機株式会社 Method of manufacturing spiral electrode group
US5486215A (en) * 1993-11-19 1996-01-23 Medtronic, Inc. Electrode assembly and method
JP3373934B2 (en) 1994-05-25 2003-02-04 三洋電機株式会社 Non-aqueous electrolyte battery with spiral electrode body
JP3525170B2 (en) 1995-06-12 2004-05-10 三洋電機株式会社 Battery with non-circular spiral electrode body
JPH11111327A (en) 1997-10-02 1999-04-23 Fuji Elelctrochem Co Ltd Battery having spiral electrode body
US6623884B1 (en) * 2000-08-07 2003-09-23 Wilson Greatbatch Ltd. Electrochemical lithium ion secondary cell having multiplate and jellyroll electrodes with differing discharge rate regions
JP2003303624A (en) * 2002-04-11 2003-10-24 Sony Corp Non-aqueous electrolyte secondary battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013143224A (en) * 2012-01-10 2013-07-22 Toyota Industries Corp Power storage device and vehicle

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KR20040080528A (en) 2004-09-20
US6887616B2 (en) 2005-05-03
KR100515830B1 (en) 2005-09-21

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